Computer Science/IT MCQs
Topic Notes: Computer Science/IT
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
2461
**What is a key advantage of a microcomputer?**
Answer:
Its affordability and compact size make it accessible to individuals and small businesses
** The microcomputer revolution, starting in the 1970s, brought computing into homes and small offices for the first time due to its relatively low cost and small footprint.
2462
Which of the following is a major advantage of computer-based exams (CBE)?
Answer:
They can provide instant results and feedback.
** One of the key benefits of computer-based testing is the ability to automate the scoring process, allowing for immediate feedback to be given to the test-taker.
2463
**What is the function of a 'firewall' in computing?**
Answer:
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules
** A firewall acts as a barrier between a trusted internal network and untrusted external networks, such as the Internet, to prevent unauthorized access.
2464
**Which of the following is an example of a computer application in daily life for entertainment?**
Answer:
Streaming movies and music
** Streaming services like Netflix, Spotify, and YouTube are popular computer applications that provide on-demand access to a vast library of movies, TV shows, and music for entertainment.
2465
The performance of a supercomputer is measured in:
Answer:
FLOPS (Floating-point Operations Per Second)
** Because supercomputers are primarily used for scientific and numerical calculations, their performance is measured by how many floating-point (decimal number) operations they can perform per second.
2466
Which characteristic of a computer is highlighted when it is used for tasks like weather forecasting and scientific research?
Answer:
High speed and accuracy
** Tasks like weather forecasting and scientific research involve massive amounts of data and complex calculations that need to be performed quickly and accurately. The high speed and accuracy of computers make them ideal for such applications.
2467
**What is an algorithm?**
Answer:
A step-by-step procedure for calculations or other problem-solving operations
** In computer science, an algorithm is a finite sequence of well-defined, computer-implementable instructions, typically to solve a class of problems or to perform a computation.
2468
**One kilobyte (KB) is equal to how many bytes?**
Answer:
1024 bytes
** In binary, which is the system computers use, computer memory is measured in powers of 2. A kilobyte is technically 2^10 bytes, which equals 1024 bytes.
2469
**Which of the following computer applications is widely used for creating and managing databases in banking?**
Answer:
Database Management Systems (DBMS)
** Banks use robust Database Management Systems to handle vast amounts of customer data, transaction records, and other financial information securely and efficiently.
2470
**Which of the following is an example of a web-based application used in daily life?**
Answer:
Google Docs
** Google Docs is a word processor that runs within a web browser without requiring any software to be installed on the user's computer, making it a web-based application.